Scaffold-hanger.



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BXSGUTMX,

SGAFEOLD HANGER.

APPLIGATIOH FILED Dm. w,

0g A. GREEN, DECT.

N? e u?? F@ 'en 'BY F *5 X7@ l /L WITNESSES.- M a d o. A. GREEN, DEGD.

K. GREEN, BXEGUTRIX.

SCAFFOLD HANGER. APPLICATION FILED DEO.17, 1913.

3 SHEETS-SHEET 2.

WITNESSES.-

mw I. 0777 {E6/Teen.

'Patented Feb. 2, 1915.

INVENTOR M Q l @MZW/ A llomeys i", A. GREEN, DEGD:

GREEN, EXEGUTBIX.

SGAFPOLD HANGER. APPLICATION FILED DEQ. l?, 1913y 3 SEEETSSHEET 3.

/VITNESSES:

` l INVENTOR @me are /j YBy A v:

A fioreya Patented Feb .2,1915, g

support the scaffold. The cable, (1 which sustains the weight of, that portion of the scaffold nearest the .wall of the building, 1s wound around the drum, D, and from thence over a shcave, d2, mounted on Va splne, d4, carried by the carrier beams, A, and a thence said cable drops sheer to the in. edge of the scaffold, F'. The cable,

2c meshes with a. pair of beveled pinions, I, l, loose on a shaft, j, journaled transversely The shaft, j, is positioned.

in the frame. in the saine horizontal plane as the shaft, G, and the beveled pinions, I, I', thus enas the beveled r, H, at diametricallv opposite points. that the cable operating mec anism is actuated, this shaft being adapted to be driven at constant speed, and in a constant direcsu tion by means of: any suitable power mechanisrn, e. g., the motor, X, illustrated.

In order that the power of the shaft, j, may be utilized to drive the beveled ear, Il, suitable clutch mechanism is provided` This mechanism is illustrated as embody .mg a sleeve, J, keyed, against rotation, to the shaft, j, but adapted for sliding movement thereon. At each end ofthe sleeve,

` J, are formed male clutchniembers, j', jg,

4o adapted to coperate with the female clutch niemliers, i', '52, formed integral with the reztive beveled pinions, I, I. Thus when thuy .sleeve is Ashifted in one direction, the clutch members, jg, 2, will coperate to 4,5 transmit rotation from the shaft, y, to the shaft, to wind the cables, d, d', upon thai r respective drums, whereby the scaifold is raised. However, when the sleeve, J, is shifted the other way, the power will be 5t 4transn'iittcd to the shaft, G, in the opposite direction, to unwind the cables from the. drums and thus lower the scaffold.

For convenience,in operating the clutch mechanic-an, just described, and particularly with a view to allowing the controlling 'i eo-f from the scaffold, I provide the al svc, J, with two fixed collars, j, inte'rmediate which is positioned th'e ends of a yoke, li which is pivotedly mounted on the te supporting. tie, fixed on the frame.

.Fori-ned integral with the stem of the yoke,V

ii, is a rocker arm, K', extending transversely ci; the frame, to the ends of which may be attached lines, 7c, 7:. These lines 'winch supports that portion of the scaf-v tl is thro h the shaft,

i ,mense are preferably led to the outer ends of the 615 carrier beams, A, where they pass over sheaves, and from thence fall sheer to the vparts of comparatively minimum weight in 75 themselves. In the practical use of the hanger, however, l find it advisable, in view of the fact that the carrier beams are anchored in place to detachably mount the frame, A', on said carrier beams, and there- 80 by preclude the necessity of a double anchoring to the building. Consequently, the frame, A', is adapted to be positioned on the carrier beams, A, at that portion thereof inside the buildin" wall, and the frame is detachably secured5 to said beams b means of straps, which are bolted at t eir respective ends to the frame and to the carrier' beam. The parts may thus be readily detached by withdrawing thebolts in either of said members.

I have set forth in the foregoing descri tion the construction of a single hanger, e shaft, j, of which can be driven from any desired source of power. It is generally necessary, however, toem loy two or more hangers for a single sca'o d and, by my in' vention the operating mechanism of these hangers may all be made operable from a common source of power by connecting the various shafts, j, of the respective hangers by shaft sections, M, in a suitable coupling, m. When this is done it will be manifest that when one of said shaft sections or `4the shaft, j, of any one ofthe hangers is operated on through the belt, N, and pulleys,n,n, by the power medium, X, the operating mechanism of allof the hangers may be actuated simultaneously. Moreover, the shaft may `extend entirely around the buildingfbeveled ears being rvided at the corners, and a l of the sca olds on the huildingmay be actuated by a single motor or en e. In such a case the entire shafting wou d be driven simultaneously: and in synchronism with the power medium, and when a workman on a scaffold desires to raise or lower the same, he may do soA by simply actuating thev selective mechanism, hereinbefore described, for utilizing the power in the shaftin for the purpose of operating his scaffo d as desired. It is desirable. however, that in view of the fact that the scaffold is only moved occasionally, to provide means to make the source of energy, X, controlla ble from the scaffold, so that the power` medium need operate only at such time as it desired to shift the sca'old. I have,

bein .j-llu'strated for this purpose.

therefore, shoifmv the electrical circuit, which 'operates' the power` medium, xcon- 'trollable from the scaffold', theswitch, "a",

num er of scaii'olds are operativelywonnected to a single powerlmediurmlines" ofA wnmg would be carried to ,eacliof 'the' scat folds so that said power medium' can be rendered, perable from'` each and every scaioldlm It will be manifest from the foregoing I description that thescaffold hanger of the present'invention is extremely simple, yet, of highly eiiicient construction, andthe fact that all of the cable operating mechanism ispositioned inside ot' the face of the Wall,

of the building, obviates the great strain on the small leverage prevalent in hangers embodying cable operating mechanism, mounted in that portion of the frame which projects out beyond the building wall. It is thus possible to make my hanger of much .lighter material, and yet obtain increased point of suspension of a scaffold on a 'building from a lower to higher story, While the 'workmen are engaged on .the scaffold, and so smoothly can the operation be performed as to be hardly noticeable. When thus done,

l the required number of'extra hangers positioned on the higher story, and the lfall ropes thereof allowed to run out until their.

ends can be attached' to the cross cleats of the scaffold. 'The motive devices are then set into operation to tighten the cables and relieve the strain on the cables of the hangers, which theretot'ore sustained the weight of the scaiold from a lower*` altitude. When this has been accomplished, said lower hangers ma i he dismantled and the scaii'old left suspen ed by the uppermost hangers.

As shown more particularly in Fig. 3. the drums, D, D,-are operatively connected to the Worm wheel, E, b v means of dogs or pawls, e, which l preferably lock m en'- gagement with the ratchet surface on the drums, by means of withdrawablc plus.. c3. Thus in the rigging of the scaffold, the pms. e3. maiy be withdrawn. and the dogs thrown back spo as to allothe cables to run free. thus obviating the necessity and precluding lost time which would be occupied in operating the power mechanism to unwind the cables to the desired extent. However,

,when the cables have run oui suiiiciently.

the dogsfare again thrown into positionL'a'ndf-f lockedbyv the pins, c3, so that allchance of accident is piedad-ed. v If a The embodiment of the A invention which l have chosen to-.describe. is fell adapted for heavy ujorlf, but l havey light Werke hanger einbodying,twjo'lcarrier beams are unnecessarf'.- and' 'a hanger embodying a singleil. beam.may .,be..empldyed in their'stead, the'shea'ves', E, t, oeing su1tably mounted thereon.

lt will be understood that the invention is. not restricted to the entire mechanism shown, as certain parts thereof may be useo separately or 'in combination with' other types of scail'oid mechanism. 'It will be further understood that, the precise location of the -scaold operating mechanism is not vi` found that for tal,`and, whileli have shown it as located in the preferred position, it may be positioned. otherwlse.

` Having thus fully described the invention, what l claim as new and desire to secure by Letters Patent is 1. A scaffolding and platform' raising means embodying, in combination, anchoring means adapted to be secured to a buildsaid anchoring means at a plurality of points, means for suspending said 4platforms, separate drums controlling severing, one or more platforms suspended from' es f' ally the suspending means, a common power shaft, and means connecting each ofthe drums with the common power shaft, said connecting means embodying mechanism for transmitting rotation to said drums either in the same direction, as, or in re verse direction to. the direction of rotation of the power shaft. i

Q. A scaffolding and platform raising means embodying, in combination, anchoring means adapted to be secured to a building. one or more platforms suspended .from

said anchoring means at a plurality of points. means for suspending said platforms. separate drums controlling severally the suspending means, a common power shaft,` and means. connecting each of the drums with thecommon-pon'er shaft, said connecting means Vembodying mechanism controllable from theplatform, for transfl mitting rotation' tosaid drums 'either'in' the same direction `asorin'reversedirection to. the direct-ion ofroiation of the power shaft.--

3. A scaffolding and platform raising means embodying; in combination, anchoring' means adapted to be secured toa building. one or more platforms suspended from said anchoring means at a plurality' of points, means for suspending said platforms. separate drums controlling nseverallyl the suspending means, a common power shaft, means connecting each of the drums with the common power shaft, saidl con- In testimony whereof I have signed my nil-me t@ this spemcatlon 111 the pms-@mv nf l0 two subscmbmg W1tnesses- 

